/* 基础样式 */
body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(120deg, #ff9a9e, #fad0c4);
    transition: background 0.5s ease;
}

/* 爱心样式 */
.heart {
    width: 100px;
    height: 100px;
    background: #ff3860;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    clip-path: path('M10 6.76L3.5 2.04c-1.58-1.03-3.3.2-3.5 1.02-.2.82.8 1.7 2.04 1.7H10v50h50c1.24 0 2.24-.88 2.04-1.7-.2-.82-1.92-2.05-3.5-1.02L50 6.76 43.5 2.04c-1.58-1.03-3.3.2-3.5 1.02-.2.82.8 1.7 2.04 1.7H40V2.04z');
    cursor: pointer;
    animation: heartbeat 1.5s infinite ease-in-out;
    filter: drop-shadow(0 0 15px rgba(255, 56, 96, 0.3));
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 爱心动画 */
@keyframes heartbeat {
    0% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.2) translateY(-20px); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

/* 悬停放大 */
.heart:hover {
    transform: translate(-50%, -50%) scale(1.5) rotate(15deg);
}

/* 樱花花瓣 */
.sakura {
    position: absolute;
    width: 15px;
    height: 15px;
    background: url(''); /* 内置简易花瓣图案 */
    animation: fall 8s linear infinite;
    opacity: 0.7;
}

@keyframes fall {
    from { transform: translateY(-100px) rotate(0deg); }
    to { transform: translateY(100vh) rotate(360deg); }
}

/* 音乐按钮 */
.music-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px;
    background: rgba(255,255,255,0.8);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}